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BattleXpGrantResult gains a LeveledUp bool set true iff at least one curve threshold was crossed during the grant (comparing pre-Level to post-Level after the level-up loop). Callers will gate class_level_up mission emits on this flag rather than caching pre-state themselves. No behavior change for existing callers — they read GetXp/TotalXp/Level today and never check LeveledUp yet. Tests cover: unchanged level → false, single threshold → true, multi-threshold within one grant → still true, unknown class guardrail → false. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>